Not even Indians and Pakistanis themselves here believe in what you just said. So you really think being part of SCO will help them resolve the Kashmir issue? Bro i'm sorry to say it, but with all due respect, that's quite naive of you to be honest.
In fact we and the U.S will be very very glad to see India and Pakistan gaining membership in this group. They will help us turn it into another SAARC. So we have nothing to do to spoil things at all.
LOOL Your parents immigrated from Iran/Turkey over to the 'evil' west to seek a better life for themselves and their children including you(which it seems they succeeded), you were born here and grew up in the west. You are also paying taxes and work here which help fund western imperialism in the world and makes the west Stronger. You should stop doing that to be honest and maybe go do that to other developing countries like China/Russia who are very non aggressive/saint/holy powers to save the world from the 'Evil' U.S/west that will be a good start/way to help 'balance the world'. Never mind that as my Chinese friend @TaiShang said, China/Russia are not trying to save the world or whatever, they are merely after their own interests and protecting themselves, not others. lool
So i don't know how your wish can come true if the Chinese and Russian leaderships themselves aren't interested. '
Pakistan and India fixing their issues INSIDE SCO is more logical than outside of it. It's been a few decades already. Perhaps it will work. Notice, I said it COULD be a venue that helps them, not that it's a silver bullet.
I have nothing against the West/US. I only dislike their foreign policy. When they invade countless countries, or are hostile against Iran and Turkey (Kurdish crap). So yes, that part I hate. Other than that, I frigging love every second of it.
Russia and China won't save the world, neither do they have to. But there comes a time when they're powerful enough to dare and go protect their interests. China only does it in it's own backyard now (South China Sea). But in a few years you might see projecting power to protect it's hundreds of billions of dollars in investments.. It's not too far off. Russia is too weak and can't do much besides arm countries.